Regional Low-Voltage Optical Compensation for Display Panels
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Solution Overview
Problem
Existing optical compensation systems struggle to accurately compensate for luminance and color coordinate differences between general and optical areas in display panels due to design variations, leading to limitations in luminance and color correction.
Innovation Solution
An optical compensation system and method that utilizes separate measurement units and controllers to optimize low voltages and black voltages for each area, applying different voltage profiles and black voltages to the general and optical areas to improve compensation accuracy.
Engineering Contradictions & Design Principles
Engineering Contradiction Analysis
1Device complexity
If a single low voltage is applied to both general and optical areas, then the device complexity is reduced, but the manufacturing precision and optical compensation accuracy deteriorate due to design variations between areas
Solution Approach 1:
The display panel is divided into two distinct areas: a general area with a first low voltage and an optical area with a second low voltage. This segmentation allows each area to be optimized independently for its specific function, resolving the contradiction between device complexity and manufacturing precision by applying different voltage levels to different regions.
Solution Approach 2:
Different low voltage levels are applied to different areas based on their specific requirements. The optical area receives a second low voltage optimized for optical device operation, while the general area receives a first low voltage optimized for display performance. This local quality approach enables precise optical compensation in the optical area without compromising the overall device functionality.
2Manufacturing precision
If separate measurement units and voltage optimization are implemented for each area, then the manufacturing precision and optical compensation accuracy are improved, but the device complexity increases
Solution Approach 1:
The measurement system is segmented into a first measurement unit for the general area and a second measurement unit for the optical area. Each measurement unit is dedicated to measuring optical characteristics in its specific area, enabling precise local measurement without requiring a complex unified measurement system.
Solution Approach 2:
The controller performs multiple functions: it controls the driver to supply different low voltages to different areas, operates both measurement units, and processes optical characteristic data from both areas to determine compensation values. This multi-functionality reduces the need for separate dedicated components, thereby managing device complexity while maintaining high manufacturing precision.
3Stability of the object's composition
If different low voltages are applied to general and optical areas, then the luminance and color coordinate uniformity is improved, but the ease of operation and voltage control difficulty increases
Solution Approach 1:
The system dynamically adjusts different low voltage levels to different areas based on their specific operational requirements. The first low voltage is optimized for the general area's display performance, while the second low voltage is optimized for the optical area's optical device operation. This dynamic voltage adjustment ensures optimal luminance and color coordinate uniformity across different areas.
Solution Approach 2:
The measurement units continuously measure optical characteristics in their respective areas, and the controller uses this feedback information to determine appropriate low voltage levels and compensation values. This feedback mechanism simplifies voltage control by using actual measurement data to guide voltage adjustment, ensuring uniform luminance and color coordinates while managing control complexity.
Data Source
AI summary
An optical compensation system includes a display device including a plurality of pixels, a first measurement unit configured to measure optical characteristics from an image displayed in a first area of the display device, a second measurement unit configured to measure optical characteristics from an image displayed in a second area of the display device, a driver configured to control at least one of the data voltage, the high voltage, and the low voltage of the display device to display an image, and a controller configured to detect a first low voltage optimized for pixels in the first area and a second low voltage optimized for pixels in the second area and to detect optical compensation values based on an image displayed by supplying the first low voltage to the pixels in the first area and supplying the second low voltage to the pixels in the second area.